Home / 2,547.31-3,515.08-1,428.09

Finding the Fourth Proportional to 2,547.31, 3,515.08 and 1,428.09

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Solution

The fourth proportional to 2,547.31, 3,515.08 and 1,428.09 is: 1,970.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,547.31 : 3,515.08 = 1,428.09 : x
  2. Step 2: Convert to fraction form
    2,547.31/3,515.08 = 1,428.09/x
  3. Step 3: Cross multiply
    2,547.31x = 3,515.08 × 1,428.09
  4. Step 4: Simplify right side
    2,547.31x = 5,019,862.74
  5. Step 5: Solve for x
    x = 5,019,862.74/2,547.31
  6. Step 6: Final answer
    x = 1,970.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.